EE105 Fall 2007Lecture 19, Slide 1Prof. Liu, UC Berkeley Lecture 19 OUTLINE Common-gate stage Source follower Reading: Chapter 7.3-7.4.

Slides:

Advertisements

Similar presentations

Differential Amplifiers

Advertisements

DIFFERENTIAL AMPLIFIERS. DIFFERENTIAL AMPLIFIER 1.VERY HIGH INPUT IMPEDENCE 2.VERY HIGH BANDWIDTH 3.DIFFERENTIAL INPUT 4.DC DIFFERENTIAL INPUT ACCEPTED.

Lecture 21 REMINDERS OUTLINE Frequency Response Reading: Chapter 11

Lecture 20 ANNOUNCEMENTS OUTLINE Review of MOSFET Amplifiers

Cascode Stage. OUTLINE Review of BJT Amplifiers Cascode Stage Reading: Chapter 9.1.

EE105 Fall 2007Lecture 8, Slide 1Prof. Liu, UC Berkeley Lecture 8 OUTLINE BJT Amplifiers (cont’d) – Common-emitter topology – CE stage with emitter degeneration.

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 17 Lecture 17: Common Source/Gate/Drain Amplifiers Prof. Niknejad.

HW#10 will be posted tonight

EE105 Fall 2007Lecture 3, Slide 1Prof. Liu, UC Berkeley Lecture 3 ANNOUNCEMENTS HW2 is posted, due Tu 9/11 TAs will hold their office hours in 197 Cory.

Field Effect Transistors Circuit Analysis EE314 HP PA8000 Fujitsu Fairchild Clipper C100.

EE105 Fall 2007Lecture 9, Slide 1Prof. Liu, UC Berkeley Lecture 9 OUTLINE BJT Amplifiers (cont’d) – Common-base topology – CB core – CB stage with source.

Lecture 23 ANNOUNCEMENTS OUTLINE BJT Differential Amplifiers (cont’d)

EE105 Fall 2007Lecture 6, Slide 1Prof. Liu, UC Berkeley Lecture 6 OUTLINE BJT (cont’d) – PNP transistor (structure, operation, models) BJT Amplifiers –

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 16 Lecture 16: Small Signal Amplifiers Prof. Niknejad.

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 21 Lecture 21: Voltage/Current Buffer Freq Response Prof. Niknejad.

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 15 Lecture 15: Small Signal Modeling Prof. Niknejad.

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 23 Lecture 23: Multistage Amps-Cascades and Cascodes Prof. Niknejad.

Lecture 22 ANNOUNCEMENTS OUTLINE Differential Amplifiers

EE105 Fall 2007Lecture 5, Slide 1Prof. Liu, UC Berkeley Lecture 5 OUTLINE BJT (cont’d) – Transconductance – Small-signal model – The Early effect – BJT.

Lecture 20: Frequency Response: Miller Effect

Lecture 11 ANNOUNCEMENTS OUTLINE Review of BJT Amplifiers

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 22 Lecture 22: Multistage Amps Prof. Niknejad.

Lecture 19 ANNOUNCEMENTS OUTLINE Common-gate stage Source follower

EE105 Fall 2007Lecture 4, Slide 1Prof. Liu, UC Berkeley Lecture 4 OUTLINE Bipolar Junction Transistor (BJT) – General considerations – Structure – Operation.

Chapter 2 Small-Signal Amplifiers

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 18 Lecture 18: Bipolar Single Stage Amplifiers Prof. Niknejad.

Reading: Finish Chapter 6

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 19 Lecture 19: Frequency Response Prof. Niknejad.

EE105 Fall 2007Lecture 14, Slide 1Prof. Liu, UC Berkeley Lecture 14 OUTLINE Frequency Response (cont’d) – CE stage (final comments) – CB stage – Emitter.

Week 9a OUTLINE MOSFET ID vs. VGS characteristic

Spring 2007EE130 Lecture 38, Slide 1 Lecture #38 OUTLINE The MOSFET: Bulk-charge theory Body effect parameter Channel length modulation parameter PMOSFET.

EE105 Fall 2007Lecture 16, Slide 1Prof. Liu, UC Berkeley Lecture 16 OUTLINE MOS capacitor (cont’d) – Effect of channel-to-body bias – Small-signal capacitance.

Lecture 25 ANNOUNCEMENTS OUTLINE

Single-Stage Integrated- Circuit Amplifiers

EE105 Fall 2007Lecture 12, Slide 1Prof. Liu, UC Berkeley Lecture 12 OUTLINE Cascode Stage (cont’d) – supplementary remarks Current Mirrors Reading: Chapter.

Lecture 7 ANNOUNCEMENTS OUTLINE BJT Amplifiers (cont’d)

Lecture 24 ANNOUNCEMENTS OUTLINE

Department of EECS University of California, Berkeley EECS 105 Fall 2003, Lecture 24 Lecture 24: Examples of Multistage Amps Prof. Niknejad.

Chapter 16 CMOS Amplifiers

EE105 Fall 2007Lecture 10, Slide 1Prof. Liu, UC Berkeley Lecture 10 OUTLINE BJT Amplifiers (cont’d) – CB stage with biasing – Emitter follower (Common-collector.

12.5 Common Source Amplifiers

BJT Amplifiers (cont’d)

JFET and MOSFET Amplifiers

FET Amplifiers Chapter 8 Boylestad Electronic Devices and Circuit Theory.

ELECTRICA L ENGINEERING Principles and Applications SECOND EDITION ALLAN R. HAMBLEY ©2002 Prentice-Hall, Inc. Chapter 12 Field-Effect Transistors Chapter.

1 Fundamentals of Microelectronics  CH1 Why Microelectronics?  CH2 Basic Physics of Semiconductors  CH3 Diode Circuits  CH4 Physics of Bipolar Transistors.

Microelectronic Circuit Design, 3E McGraw-Hill Chapter 14 Single-Transistors Amplifiers Microelectronic Circuit Design Richard C. Jaeger Travis N. Blalock.

BJT Amplifier. BJT Amplifiers: Overview Voltage Amplifier In an ideal voltage amplifier, the input impedance is infinite and the output impedance is.

1 DC Imperfections: Input bias current: Input offset current:

1 Tai-Cheng Lee Spring 2006 MOS Field-Effect Transistors (MOS) Tai-Cheng Lee Electrical Engineering/GIEE, NTU.

Field Effect Transistors (2)

1 Small Signal Model MOS Field-Effect Transistors (MOSFETs)

Solid-State Devices & Circuits

University of Toronto ECE530 Analog Electronics MOS Single Stage Amplifiers # 1 MOS Single-Stage Amplifiers.

Recall Lecture 17 MOSFET DC Analysis 1.Using GS (SG) Loop to calculate V GS Remember that there is NO gate current! 2.Assume in saturation Calculate I.

Chapter 8: FET Amplifiers. Copyright ©2009 by Pearson Education, Inc. Upper Saddle River, New Jersey All rights reserved. Electronic Devices and.

6/8/2016Faculty of Engineering Cairo University Chap Lecture 2 Single-Transistor Amplifiers Dr. Ahmed Nader Adapted from presentation by Richard.

ECE 333 Linear Electronics Chapter 7 Transistor Amplifiers How a MOSFET or BJT can be used to make an amplifier  linear amplification  model the linear.

MOSFET Basic FET Amplifiers The MOSFET Amplifier

Chapter 8: FET Amplifiers

Recall Lecture 17 MOSFET DC Analysis

HW#10 will be posted tonight

FET Small Signal Analysis ENGI 242 ELEC 222. March 2003FET Small Signal Bias2 g m at Q.

Lecture 21 REMINDERS OUTLINE Frequency Response Reading: Chapter 11

Lecture 10 ANNOUNCEMENTS OUTLINE BJT Amplifiers (cont’d)

HW#10 will be posted tonight

Reading: Finish Chapter 17,

Chapter 8: FET Amplifiers

Lecture 24 ANNOUNCEMENTS OUTLINE

Analysis of Single Stage Amplifiers

Presentation transcript:

EE105 Fall 2007Lecture 19, Slide 1Prof. Liu, UC Berkeley Lecture 19 OUTLINE Common-gate stage Source follower Reading: Chapter

EE105 Fall 2007Lecture 19, Slide 2Prof. Liu, UC Berkeley Diode-Connected MOSFETs Note that the small-signal model of a PMOSFET is identical to that of an NMOSFET Diode-connected NMOSFET Small-signal analysis circuit Diode-connected PMOSFET

EE105 Fall 2007Lecture 19, Slide 3Prof. Liu, UC Berkeley Common-Gate Amplifier Stage An increase in V in decreases V GS and hence decreases I D.  The voltage drop across R D decreases  V out increases  The small-signal voltage gain (A v ) is positive.

EE105 Fall 2007Lecture 19, Slide 4Prof. Liu, UC Berkeley Operation in Saturation Region For M 1 to operate in saturation, V out cannot fall below V b -V TH.  Trade-off between headroom and voltage gain.

EE105 Fall 2007Lecture 19, Slide 5Prof. Liu, UC Berkeley I/O Impedances of CG Stage ( = 0) Small-signal analysis circuit for determining output resistance, R out Small-signal analysis circuit for determining input resistance, R in

EE105 Fall 2007Lecture 19, Slide 6Prof. Liu, UC Berkeley CG Stage with Source Resistance Small-signal equivalent circuit seen at input For  = 0:

EE105 Fall 2007Lecture 19, Slide 7Prof. Liu, UC Berkeley The output impedance of a CG stage with source resistance is identical to that of CS stage with degeneration. Small-signal analysis circuit for determining output resistance, R out

EE105 Fall 2007Lecture 19, Slide 8Prof. Liu, UC Berkeley CG Stage with Biasing R 1 and R 2 establish the gate bias voltage. R 3 provides a path for the bias current of M 1 to flow.

EE105 Fall 2007Lecture 19, Slide 9Prof. Liu, UC Berkeley CG Stage with Gate Resistance For low signal frequencies, the gate conducts no current.  Gate resistance does not affect the gain or I/O impedances.

EE105 Fall 2007Lecture 19, Slide 10Prof. Liu, UC Berkeley CG Stage Example Small-signal equivalent circuit seen at input Small-signal equivalent circuit seen at output

EE105 Fall 2007Lecture 19, Slide 11Prof. Liu, UC Berkeley Source Follower Stage Small-signal analysis circuit for determining voltage gain, A v Equivalent circuit

EE105 Fall 2007Lecture 19, Slide 12Prof. Liu, UC Berkeley Source Follower Example In this example, M 2 acts as a current source.

EE105 Fall 2007Lecture 19, Slide 13Prof. Liu, UC Berkeley R out of Source Follower The output impedance of a source follower is relatively low, whereas the input impedance is infinite (at low frequencies); thus, it is useful as a voltage buffer. Small-signal analysis circuit for determining output resistance, R out

EE105 Fall 2007Lecture 19, Slide 14Prof. Liu, UC Berkeley Source Follower with Biasing R G sets the gate voltage to V DD ; R S sets the drain current. (Solve the quadratic equation to obtain the value of I D.) Assuming = 0:

EE105 Fall 2007Lecture 19, Slide 15Prof. Liu, UC Berkeley Supply-Independent Biasing If R s is replaced by a current source, the drain current I D becomes independent of the supply voltage V DD.